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2019

University of Nebraska - Lincoln

Environmental Engineering Theses and Graduate Student Research

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Theoretical Model For Shields Diagram And Its Application, Jichao Jiang May 2019

Theoretical Model For Shields Diagram And Its Application, Jichao Jiang

Environmental Engineering Theses and Graduate Student Research

The transition from the condition of “no motion” to initial sediment moment, defined as sediment initiation, has been related to practical engineering (channel degradation, stable channel design), oceanographic (dredging, pipelines, cables), sedimentologic (sediment mobility, transport rates), geologic (the hydraulic interpretation of paleoenvironments), geochemical (pollutant transport), and gained considerable interest since nineteenth century.

Shields diagram for sediment initiation in terms of critical shear stress is a classic problem in sediment transport, but it is still an empirical law without a simple and practical theory despite extensive research since the 1930s. Hence, this research presents a simple theoretical model for critical shear ...